MPC5xxxのトピックRe: About Flash Program on Internal Flash (MPC5674F)

About Flash Program on Internal Flash (MPC5674F)

hyenongijeong — Fri, 19 May 2017 08:48:47 GMT

Hi,

I have a problem with the flash program.
When writing data to multiple addresses, it is shown as below.
I also attached my code. The code proceeded in the order of the datasheet.
What's wrong with my code?

main()

{
uint32_t ulDATA[10], i;
for(i=0;i<10;i++)
ulDATA[i] = 0x11111111*(i+1);

ulErrCode = DRV_Flash_Write(0x10000, &ulDATA[0], 10);
}

uint32_t DRV_Flash_Write(uint32_t _u32Addr, uint32_t *_pData, uint32_t _u32WLen)
{
uint32_t i, errCode;

/* unlock L4~L9 in flash array A */
FLASH_A.LMLR.R = FLASH_LMLR_PASSWORD;
FLASH_A.LMLR.R = 0x0013000F;
FLASH_A.SLMLR.R = FLASH_SLMLR_PASSWORD;
FLASH_A.SLMLR.R = 0x0013000F;

// Step 1
FLASH_A.MCR.B.PGM = 1;
// Step 2 & 3
for(i=0;i<_u32WLen;i++)
{
*(vuint32_t *)(_u32Addr+i*4) = *_pData+i; /* interlock write */
// Step 4
FLASH_A.MCR.B.EHV = 1; /* start programming */
// Step 5
while(FLASH_A.MCR.B.DONE == 0){}; /* wait for done */
// Step 6
if(FLASH_A.MCR.B.PGM != 1)
{
// Error
errCode = 7;
}
// Step 7
FLASH_A.MCR.B.EHV = 0;
// Step 8 // to do : go to step 2
}
// Step 9
FLASH_A.MCR.B.PGM = 0;
if(FLASH_A.MCR.B.PEG == 0)
return 2; /* return error if PEG was not set */

return errCode;
}

Re: About Flash Program on Internal Flash (MPC5674F)

lukaszadrapa — Mon, 22 May 2017 11:31:27 GMT

Hi,

from the reference manual:

You can't program two 32bit words within one double word (64bits) separately. It is necessary to write the data at once. Something like:

FLASH_B.MCR.B.PGM = 1;
*(unsigned int *)0x000C0000 = 0xAABBCCDD;

*(unsigned int *)0x000C0004 = 0x11223344;
FLASH_B.MCR.B.EHV = 1;
while(FLASH_B.MCR.B.DONE == 0){};
FLASH_B.MCR.B.EHV = 0;
FLASH_B.MCR.B.PGM = 0;

Regards,

Lukas

Re: About Flash Program on Internal Flash (MPC5674F)

hyenongijeong — Tue, 23 May 2017 04:04:10 GMT

Hi,

Thank you. The code has some error. my mistake.

Thank you for your response.

Regards,

Henk